14 CFR 27.1301 : Aeronautics And Space (§ 1.1 To Parts 1311-1399) — (§ 1.1 To Parts 50-59) — Federal Aviation Administration, Department Of Transportation (§ 1.1 To Parts 50-59) — Aircraft (§ 21.1 To Parts 50-59) — Airworthiness Standards: Normal Category Rotorcraft (§ 27.1 To Appendix D To Part 27) — Equipment (§ 27.1301 To § 27.1461) — General (§ 27.1301 To § 27.1317) — Function and installation.

4 Aug 2016

Each item of installed equipment must -

(a) Be of a kind and design appropriate to its intended function;

(b) Be labeled as to its identification, function, or operating limitations, or any applicable combination of these factors;

(d) Function properly when installed.

14 CFR 27.1301